Merge topic 'clang_cuda_prep'

d86fcc63 CUDAToolkit: Deduce toolkit binary directory from compiler path only for NVCC
87e98bf8 CUDA: Forward CMAKE_CUDA_COMPILER_TARGET in try_compile()
60e60b92 GNU: Disable depfiles in try-compile mode only for GCC
5f02add3 CUDA: Refactor PTX compilation flag into compiler modules
25439c7d Clang: Refactor CXX standard flags into __compiler_clang_cxx_standards()

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4567